EXTON, Pa.--(BUSINESS WIRE)--Absorption Systems, a leader in testing drugs for ADMET (Absorption, Distribution, Metabolism, Excretion and Toxicity), has joined the Society of Toxicology, the premier global professional association of toxicologists, as an SOT Affiliate. The firm, a contract research organization, has more than a decade of experience assisting pharmaceutical and biotechnology companies in determining which compounds in development should be advanced into clinical testing. Absorption Systems had focused on ADME testing for years, and broadened its portfolio of services to include toxicology through the mid-2009 acquisition of an AAALAC-accredited GLP toxicology testing facility in San Diego, CA.